Ex-Aqua 2019
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EX-AQUA 2019 EX-AQUA 2019 PALAEOHYDROLOGICAL EXTREME EVENTS EVIDENCE AND ARCHIVES September 26th - 29th 2019, Zagreb, CROATIA Croatian Academy of Sciences and Arts Scientific Committee Alessandro Fontana (University of Padova), Juergen Herget (University of Bonn), Rajiv Sinha (Indian Institute of Technology, Kanpur), Willem Toonen (University of Leuwen), Mladen Juračić (Croatian Academy of Sciences and Arts), Igor Felja (University of Zagreb) Organizing Committee Mladen Juračić (Croatian Academy of Sciences and Arts), Igor Felja (University of Zagreb), Alessandro Fontana (University of Padova) ABSTRACT VOLUME WORKSHOP EX-AQUA 2019 “PALAEOHYDROLOGICAL EXTREME EVENTS: EVIDENCE AND ARCHIVES” Croatian Academy of Sciences and Arts 27th September 2019, Zagreb, CROATIA EX-AQUA is a project supported by the INQUA Commission on Terrestrial Processes, Deposits, and History (TERPRO) and HEX (INQUA Focus Area on Palaeohydrology and fluvial archives – extreme and critical events). This scientific project aims at creating a network of researchers of different disciplines to work together for improving the knowledge on magnitude, recurrence time and other characteristics of the palaeohydrological extreme events (floods and droughts). EX-AQUA considers the whole Quaternary, but with special interest in the last millennia, for extending the useful records in the assessment of present and future extreme events. The workshop planned in Zagreb is also supported by the Croatian National Committee of INQUA and it follows the workshops organized in Italy (Padova, September 2016), India (Noida, November 2017) and Hungary (Szeged, September 2018). The aim of the meeting is to bring together scientists interested in topics related to palaeohydrology for scientific exchange, facilitating the participation of early career scientists and PhD students. Based on a grant generously provided by INQUA (International Union for Quaternary Research) commission on Terrestrial and continental processes, part of the participants is sponsored and no conference fees are required. The title EX-AQUA consists of the Latin words “ex” (meaning “from” but also “ancient”) and “aqua” (water) and it symbolizes the processes related to the lack or the abundance of water in the past. People involved in EX-AQUA forms an open community of geologists, physical geographers, geochronologists, historians, archaeologists, palaeobotanists, engineers and modellers. Thursday 26th – Meeting Meeting from 18:30 at Hotel Livris (Rapska Ulica 12) where most of the participants are accommodated and light dinner at Batlak Grill (Radnička cesta 37c). Friday 27th – Workshop The workshop is locally organized by Mladen Juračić (Croatian National Committee of INQUA) and Igor Felja (Department of Geology of University of Zagreb) and will be held at the Croatian Academy of Sciences and Arts (Trg Nikole Šubića Zrinskog 11), which is also the hosting institution for the Croatian National INQUA Committee. Saturday 28th and Sunday 29th – Field Trips On Saturday 28th September there will be the opportunity to visit the area near the Lakes of Plitvice, which are included in the list of UNESCO sites and are among the most famous naturalistic places in Europe. The visit will bring the group in some key locations for understanding the palaeohydrological evolution of the area during the Late Quaternary. On Sunday 29th September a half-day field trip is planned in the valley of the Sava River (retention basin of Lonjsko polje), with return to Zagreb around 15:00. 1 WORKSHOP PARTICIPANTS Petra Bajo (Croatian Geological Survey, Zagreb, Croatia), pbajo@hgi‐cgs.hr Katarina Botić (Institute of Archaeology, Zagreb, Croatia), [email protected] Dea Brunovic (Croatian Geological Survey, Zagreb, Croatia), dbrunovic@hgi‐cgs.hr Sanja Faivre (University of Zagreb, Croatia), [email protected] Igor Felja (University of Zagreb, Croatia), [email protected] Alessandro Fontana (University of Padova, Italy), [email protected] Luca Gasperi (University of Padova, Italy), [email protected] Kartika Goswami (Indian Inst. Science Educ. Research, Kolkata, India), [email protected] Jürgen Herget (University of Bonn, Germany), jherget@uni‐bonn.de Nikolina Iljanić (Croatian Geological Survey, Zagreb, Croatia), nilijanic@hgi‐cgs.hr Ivona Ivkić (Croatian Geological Survey, Zagreb, Croatia), iivkic@hgi‐cgs.hr Mladen Juračić (University of Zagreb, Croatia), [email protected] Robert Lončarić (University of Zadar, Croatia), [email protected] Ekaterina Matlakhova (University of Moscow, Russia), [email protected] Slobodan Miko (Croatian Geological Survey, Zagreb, Croatia), smiko@hgi‐cgs.hr Hasan Ozren (Croatian Geological Survey, Zagreb, Croatia), ohasan@hgi‐cgs.hr Katarina Pavlek (University of Zagreb, Croatia), [email protected] Ivan Razum (Croatian Geological Survey, Zagreb, Croatia), [email protected] Sandro Rossato (University of Padova, Italy), [email protected] Manudeo Singh (Indian Institute of Technology, Kanpur, India), [email protected] Rajiv Sinha (Indian Institute of Technology, Kanpur, India), [email protected] Maša Surić (University of Zadar, Croatia) [email protected] Ana Trobec Novak (University of Ljubljana, Slovenia), [email protected]‐lj.si 2 27th September 2019, Zagreb ‐ Croatian Academy of Sciences and Arts 9:00 – 9:10 Greetings and opening 9:10 – 9:40 Jürgen HERGET ‐ Reconstructing discharges of historic flood levels (invited) 9:40‐11:00 Ivona IVKIĆ ‐ Late Quaternary karst paleohydrology, geomorphology and sedimentology of Prološko Blato paleolake in Imotsko Polje, Croatia Ivan RAZUM ‐ Holocene paleoclimatic conditions recorded in Sr/Ca ratio of inorganic aragonites from Veliko Jjezero, Mljet Island (Croatia) Katarina PAVLEK ‐ Changes in channel morphology of the Cetina River since the end of the 19th century (central Mediterranean) Robert LONČARIĆ ‐ A history of the occurence of Blidinje Lake (Bosnia and Herzegovina) 11:00‐11:20, coffee break 11:20‐13:00 Manudeo SINGH ‐ Paleohydrology and evolutionary pathways of floodplain wetlands in north Bihar, east Ganga Plains, India Kartika GOSWAMI ‐ Response of the modern and late Holocene floods to climate change: Evidence from sedimentary archives from the upper Kaveri basin (India) Rajiv SINHA ‐ Mapping historical‐scale planform dynamics for sediment budgeting of the Ganga River (India) Ekaterina MATLAKHOVA ‐ Late Pleistocene hydrological extreme events in middle Don River basin (Khoper and Vorona key study) 13:00‐14:00, lunch (free) 14:00‐14:30 Maša SURIĆ ‐ The use of speleothemes in paleohydrologic reconstruction (invited) 14:30‐15:30 Dea BRUNOVIĆ ‐ Cyclicity of the marine, lacustrine and fluvial environments during the late Quaternary in the Lošinj Channel isolation basin, Croatia Ana NOVAK ‐ Late Quaternary evolution of the submerged northern Adriatic shelf – a concealed fluvial archive Ozren HASAN ‐ Paleolandscapes of karst rivers on the Dalmatian coast submerged as a consequence of the Holocene sea‐level rise 15:30‐16:00, coffee break 16:00‐17:00 Luca GASPERI ‐ Paleohydrology along the Musone River (Venetian Plain, NE Italy) Katarina BOTIĆ ‐ Change in settlement positions regarding some major Holocene climate events case study of two sites in Drava region Alessandro FONTANA ‐ The medieval deluge in Northern Italy: from myth to geoarchaeological evidence 19:00, Social dinner at Pivnica Medvedgrad, (Zagreb, Ilica Street 49) 3 RECONSTRUCTING DISCHARGES OF HISTORIC FLOOD LEVELS Herget J. Dept. of Geography, University of Bonn, Germany Corresponding author: Jürgen Herget ([email protected]) For historic settlement areas numerous flood level descriptions from times before the installation of river gauges are passed on, most of them are even dated. Typically, these written descriptions are qualitative such as “the water level peaked at 2 feet above the floor of the church” or “the water level topped the bridge before it failed”. Furthermore, historic flood water levels are frequently marked at buildings and constructions. Such descriptions of flood water levels are used to determine periods of increased flood frequencies but are rarely transferred into palaeodischarge numbers due to methodological problems. One major problem is the estimation of the cross section area due to missing information on the topography and hydraulic roughness of the floodplain and the river channel in historic times. For the historic flood level records from the cities of Cologne (River Rhine) and Prague (River Vltava) an approach to estimate peak discharge is developed. Based on historic etchings, paintings and descriptions it is possible to reconstruct the characteristics of the river channel and floodplains to estimate cross-section areas during flood events. The reconstruction made use of all available data and estimations regarding channel incision as well as anthropogenic modification of the river and its floodplain. The mean flow velocity at the time of the historic flood events is estimated by the Manning- equation, based on the reconstructed river channel and floodplains. The slope of the water level is assumed to be comparable to recent values, while the estimation of the hydraulic roughness is a challenge as no studies on the hydraulic roughness of settled floodplains have been carried out so far. Sensitivity studies with different n-values within a reliable range are carried out to estimate the influence of this uncertainty. Finally, the reconstructed data are tested by estimating peak discharges of recent floods by the application